Seeking source for wheel joining studs

[Grant Bowker]

I'm looking for reasonably priced bolts that can be made into the studs for joining wheel halves (either the countersunk ones used on 16" rims for the 15 cwt or the mushroom headed ones for the 20" rims on the 60cwt). I measure the thread as 7/8" 11 t.p.i. which matches BSF specs.
After much hunting without luck I came across this site http://www.fastfixdirect.co.uk/code/...rch=Show+Items that seems to list them at GBP 150 per 20 bolts.
It's good to know that it's still possible to find them (I'd just about given up hope) but does anyone have a more economic source?