400 with TF 240 heads - valley plate options?

Getting ready for my engine build and decided on a 470 with TF 240 heads. From what I've found, there doesn't seem to be many options for the valley plate on a B engine with these heads - at least one that doesn't cost $200..... Even the one Trick Flow makes only works with the 270 heads? I guess if it had a removable section - maybe I could justify the $$ but man. Anyone have an alternative that works and doesn't cost so much? Did my looking and thought I'd check with those that have gone before......thank you in advance. <><
Does anyone know if the Indy plate will work work with these heads?