I'd ignore the inside leg measurements of golf waterproofs, its my experience that they bear no relation to the reality of how the trousers fit.
I've found trousers in 31" (still two inches too long for me!!) inside leg that clearly have an excess of 6" trailing around my feet.
the only way of ensuring a decent fit is to try them on. Dont be surprised if you find a pair of 33" waist and 31" i/leg actually fit you perfectly when you are in fact a tubby 38" gut and 35" i/leg.
(Not saying your a tubby 38" waist....just using it as an example you understand!!)
Slugger, I have same measurements as you (ooh, missus) and have a Sunderland GT Pro suit with the breeks in "long". Fits perfectly although it states they are only 33" in the leg..
This suit is no longer made I believe, but no doubt the sizes will be constant in other models.
One other option is to try the ProQuip range. Kurt Mungall (pro at Lothianburn) usually has a good stock and if needed, he can get stuff quickly from their warehouse in North Berwick.
I agree about the inside leg measurements. I am a 34" inside leg and my nike waterproofs are 31" and fit fine. Need to try them on rather than make a purchase online.