[fletchwe]

Height should be .180. Just about every style of Sight is available with a front tenon or post / rear dovetail. Fusion Firearms site is easy to search and has notations regarding fits to Colt clones. You can also have a front dovetail milled generally for around $35. Once you pick a style, the search is on.

 

[fletchwe]

Installed this set a couple of months ago on a RIA. Great sight picture for old eyes.

http://store01.prostores.com/servlet/fusionfirearms/the-348/Sight-set-for-1911/Detail

 

[fletchwe]

One other requirement I should have mentioned. RIA uses a narrow tenon. Look for that in Sight descriptions and/or clarify that with Seller when ordering.

 

[fletchwe]

It is likely a 70 Series. Tell the Seller what model you have.