If you're not concerned about preserving the original stock, and are reasonably handy, you could consider sawing a bit off the comb and adding new wood. The dollar cost would be negligible and the benefits many. While rasping, test firing, sanding and finishing, you will

1) learn much about gun fit
2) learn whether you're cut out for stockwork
3) hopefully wind up with a decent pattern for duplicating should you decide to upgrade the stock later

I think it's an excellent place for a beginner to begin. Unlike metal work, you can't do any harm that money can't correct.

OTOH, with a budget of $200, you should be able to entice a stockmaker, or at least a skilled woodworker to do the job for you.