There are other places also but I keep going back to Brownells 'cause they have soooo many items for all guns as well as tools and they are very reasonable with retail and better if you can get their wholesale prices. There service is outstanding. When you call them, they'll help you anyway they can and shipping is cheap.
I carry some stuff on my site for 1911's I don't know exactly what your looking for but I offer free shipping on any order over $150. If you happen to check it out, please let me know how I can improve or what else I should carry.