I believe this casting was designed to fit a RR 4025 boom. Rig Rite also sells a casting for $ 159
http://www.rigrite.com/Spars/Pearson...4025_Boom.html
I'm certain that our boom is different than the 4025. The picture below shows the inside of our boom where the casting goes
I think the casting cost about $ 80 from D & R. I can't find my notes on that.
Rudy seems to have a different price for his products every time you call him anyway
http://www.drmarine.com/default.asp