high frequency unit

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i have a miller trailblazer 250g and i am looking for a high frequency box to add to this machine so that i can weld aluminum alloys.  does anyone know of a welding supplier that i can contact to get a price quote  on this product.  i have priced one in my local area and i just want to shop around and see if i can find anything a little cheaper.  i have heard of people picking up high frequency boxes much cheaper than the price that i had gotten so im wondering if anyone may know anything about the cost of this product.                     THANKS.
Reply:Try Brwelder.com, they are in Maryland.Have a great day.BrianLincoln Mig 215Miller 211Victor Torch SetMiller Maxstar 200SDMiller Syncrowave 250DX Tig runnerMiller Trailblazer 302 running on LPMiller Extreme 12 VS SuitcaseEllis 1600 BandsawMiller xmt350 CC/CVLincoln Vantage 300
Reply:Look on ebay, check the big internet welding suppliers- but unless you find used, you probably wont save all that much.I have a miller HF unit, which I just ordered from my local welding supply and paid what they asked for it- I needed it right then, and I find my local guys treat me right- they usually discount a little for me, but I have an account, and spend an average of $300 a month there on supplies, so I often get freebies thrown in, or delivery on urgent parts, just plain good service. I have used the HF unit with the trailblazer, and it works great. We do a lot of site tig welding, mostly stainless, so I am usually running it DC, start only, but it will do AC continuous very well too. I have a little cart made up with the HF unit, a Radiator, a water cooled torch and foot pedal, and I can either run it in the shop with an inverter power supply, or throw the whole thing in the truck and run it off the trailblazer.I would recommend sticking with the miller unit just for the plug and play aspect- everything plugs right in, and it is real easy to move it around, or reconfigure it- foot pedal, remote hand controller, scratch start, move it from power supply to power supply, and plus it has a gas solenoid, which not all of them do. My only gripe would be no adjustable pre and post flow.
Reply:Ries...thanks for the info.  i thought maybe a HF unit would be  a little cheaper than the price i got from miller but so far, it seems like thats the going rate so im gonna have to just do like u did and pay the price for one as i need it anyhow.  the local welding supply around my area wants $800 for one.   im also interested in that little water cooler that u mentioned.  i have a water cooled torch and a foot pedal so all im lacking is the water cooler.  i know the little bernard coolers are pretty expensive so i was wondering approx. how much u have invested in ur little set up.  i was also wondering how i could make one and after reading about urs, i see that it does sound like it works pretty well.  if u can give me a little bit more info on how to build one and the approx. cost i would appreciate that very much too.   also thanks again for the reply.