Geoff pretty sure aviaid or dry sump.com do a full rb26 kit (maybe an external kit too), they are not on the site but are listed somewhere... just cant find it atm,
i just got a full AVIAID dry sump kit (3 stage) with largest tank, cast sump (billet avail), ati balancer and drive, breather / separator all fittings etc for about the same price as decent wet pump and large capacity sump here in aus..... 12 day from order in cali to delivery here in aus... awesome.
Honestly any serious 26 i do again will have one of their kits. Speak to john schwarz @ AVIAID in chatsworth California, see what they have avail.
Mazworx get all their sumps and parts via ARE http://www.drysump.com/index1.htm which also do some nice gear.