Flat rocker Longboard

I'm getting back into surfing after getting a titanium hip replacement from skateboarding. I don't pop up as quick with the new hip & want to catch waves earlier to allow extra pop up time. My thought is a board with less rocker or "flat rocker" would help me paddle more efficient, faster, & glide to catch waves sooner.
What is a good flat rocker board? Are there any shapers/builders that have a flat rocker model? Dont really want to spend the bucks to have one made just now. This board may only be used for rehab, as I get my legs back under me. I'm 6-1" , 230 lbs. hopefully the girth will shrink in time, but for now I am what I am.
Any ideas?
What is a good flat rocker board? Are there any shapers/builders that have a flat rocker model? Dont really want to spend the bucks to have one made just now. This board may only be used for rehab, as I get my legs back under me. I'm 6-1" , 230 lbs. hopefully the girth will shrink in time, but for now I am what I am.
Any ideas?