Acetylene regulator stem swap question

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Anyone out there have a source for the nipple/nut combination to change an acetylene regulator over to fit a "B" cylinder?  I picked up a used Harris regulator for nothing and would like to convert it so I don't need an adapter.
Reply:I'd go to AirGas and buy a fitting for the cylinder I needed. The fittings just screw into the regulator body if you don't want an adapter. They are a bitch to get out though without scratching up the regulator.Lincoln 175HD Miller AC/DC ThunderboltSmith AW1, Dillion (Henrob) Mark III, & Smith LittleTorch
Reply:Many people will recommend not using an adaptor like you intend,  but changing the inlet nut & nipple can cause a few problems if you are not careful.   Depending on the age of your regulator and the model number, Harris may have used a threadlock compound that makes it hard to get the inlet nut & nipple out without snapping off the nipple in the regulator. If you get it out without snapping it off, make sure you remove any dirt or debris that is in the inlet fitting on the regulator.  It only takes a very small piece of debris to get on the seat of a regulator, to cause the regulator to start creeping (building pressure).If you choose to use an adaptor, these are the part numbers.   To go from CGA 510 to CGA520(B size tank) use a Western #315 or Superior # A840. If the acetylene regulator has  CGA 300 you will need a Western #316 or Superior # A804.  You should be able to get the 520 inlet connections or the adaptors for your LWS.  If  not there are a lot of companies that sell fittings on the net.Hope this Helps!OAdoctorwww.regulatortorchrepair.com