If you want the 902 quickly then Simon's suggestion may be all that is open to you. Try SDS and Nova Darkroom first as both have quite a range of second-hand stuff.

I have very rarely seen a 902 on the U.K. e-bay in recent months.

If you go for new be prepared to pay quite a lot. They aer very nice lights and you can get a range of fronts such as red etc

pentaxuser