While inquiring about purchasing a rear sight from someone here? I found that the rear sight height depended on the height of the front sight . Meaning, TC made different height front and rear sights and it was proving difficult to find the correct one,used.
So, I just contacted TC by telephone and asked to buy one. They were very helpfull, the rear sight wasnt expensive at all. I think It was only like $25 at the most, few dollars for shipping and within a week I had the new correct sight in my hand.
Hope this helps?