Send me a private note and I'll let you know where I have purchased similar items on line. I'm not sure if Terry wants us to list firm names.
I have also found that a few of the major industrial supply and plumbers supply firms in my area will sell to me.
Are you purchasing any fixtures? My local supply store opened up to me when I asked them to quote about $1000 in fixtures. Once they setup a homeowners account, they opened up their supply side. I asked the sales person to help setup an industrial account. I've actually found that they have been a good source of information.
Steve