I think those use the standard #900001 kit, same as Conshelf.
Bryan at vintagedoublehose com has those as well as Northeast Scuba Supply.
If those regs of yours are only 2 years old with 20 dives and have been rinsed correctly (no water allowed into 1st stage) then they are no where near ready to service.
Service them only when they really need it. Every time you break a reg down and change stuff it wears on hard parts and increases the likelihood of damaging something. This is especially true of some dive shops where a monkey in training is working on your regs. At least when you work on them you personally know what you did and you also get to learn your reg and demystify the whole process that dive shops love to keep so secret. They keep it secret because they don't want people to know how easy it is. Get a simple pressure gauge at Harbor Freight to check IP and hook it up to a LP hose. the internal pressure should be 135 to 140 PSI.
Any of those AL regs are nice because you can adjust the IP simply by tightening or loosening the flat or hex key that sits on the back of the diaphragm.