The Whirlpool at Lowes in the post above I see is out of stock.
However, the OEM Norcold one is fairly readily available at quite a few places for not too much more cost and you'll know it will be an exact fit.
The part number is 633324
Here it is at RVupgrades.com (..an iRV2 vendor. Many of us consider it our favorite or preferred vendor. The owner was the founder of these forums)
Norcold 633324 Ice Maker Assembly
Here is the 1200 parts list catalog if you do not already have it;
Norcold Parts List 1200 Series