RE: Welcome to Club SAITO !
Have had same issue with spray bar for the 150. Ordered one directly with Horizon and the wrong part arrived 2 weeks later. Sent it right back to Horizon and got the right spray bar after another week or so. Parallel, I ordered a second spraybar with my LHS and they cannot deliver until Jan/Feb 2007(!).
Let's move away from SAITO! I am spending too much money into the hobby to only wait for some silly brass parts.