I need a couple of 1/2 BSP 90 degree oil hose uniions to connect to my oil cooler, where can i get them from?

Your local branch of Pirtek, or any other company listed in Yell.com that makes hydraulic hoses.

Texas ?

Think Automotive do a decent range of fittings in various materials.

[Edited on 24/1/11 by r1_pete]

Friction Hydraulics in telford or James Lister Group, few branches local