Cheers for your prompt reply.
Yes you appear to be quite right. it appears that this pump was also in the Supra. The problem seems to be that the hydraulic pump was discontinued in the Lexus in1998, simultaneous with the end ot the Supra production?
So I am looking for a part from a limited number of scrap cars, a pump which is no longer held by Toyota. I am told that the engine can be adapted to take the later electric pump, again if I can find one. Unfortunately I have to consider if it is worth it. I would consider buying in a Lexus for parts but regrettably I have nowhere to keep a spare car!