Suggestions on simple boards to convert

Hello all, long time reader that has finally decided to build my own efoil. I am looking for suggestions to get a cheap starting board that I can build on. To start I will put my electronics and such in a box and buy a mass separetly.

I tried searching on here but couldn’t find an answer. Anyone got any links? Preferrably if I dont have to do any modifications to it.

Gong keeps a second hand and refurbished section on their website. I picked up a wing and stab last summer there. They do have some discounted boards as well.