I know the part everyone recommends is this one from mcmaster:
4464K214 Type 304 SS Thrd Pipe Fitting 1/2" Pipe Size, 1-1/16" OD, Cplg, 1000 PSI, 1-3/8" L
I found this part on ebay however and it seems to be the same. The only difference possibly being length. Do you think this part will work as a substitute?: http://cgi.ebay.com/1-2-Coupling-fi...tem&pt=LH_DefaultDomain_0&hash=item3a5ce84e6b
4464K214 Type 304 SS Thrd Pipe Fitting 1/2" Pipe Size, 1-1/16" OD, Cplg, 1000 PSI, 1-3/8" L
I found this part on ebay however and it seems to be the same. The only difference possibly being length. Do you think this part will work as a substitute?: http://cgi.ebay.com/1-2-Coupling-fi...tem&pt=LH_DefaultDomain_0&hash=item3a5ce84e6b