Hi Tom, welcome to the forum. Yes it is a great site to learn and bounce questions off other members. I'm currently restoring a SB45 17" and you will be surprised at the amount (if not all) parts are still available.
If I can offer some advise, the original parts made by SB are of excellent quality and I recommend to have a go at restoring these before you go and buy new ones. You will save a lot of money.
