Ask HN: Forming a new startup based on old one

I used Stripe Atlas to create a Delaware C Corp and it came with all the attendant documents about shares vesting etc...

I ended up dissolving and moving to an LLC. But now I've decided I do want to try to raise money (at least a seed round) and I don't want to just use the standard Stripe Atlas contract, considering I've already put a year and a half of work in developing the software.

Should I just approach a lawyer that specializes in this sort of thing? I want something that will be easy to put on AngelList but doesn't start me from zero.