TC has a following that is fueled more by nostalgia than by actual quality. The TC molds I have owned were not very good, about like LEE but anodized in a brown-copper tone. They did not have a steel insert for the guide pins and wore quickly. I would not seek them out.
Accurate molds cost $90 for a 2-cavity and $144 for a 4-cavity.
They have a maxi in 54 listed already. I would use it as a template with amended dimensions scaled for 45 caliber. Once you figure out the reduction in dimensions, multiply by 0.833 in this case, and send the resulting measuring drawing to him for review. You could also get hold of a TC maxi ball and measure it. I think you want the larger top band to engrave.
He is very fast. The molds are the best I have ever used. I can not detect any difference between cavities. The bullets drop out easily and can be placed on the landing area.
Keep in mind he is deaf. You can not call. Correspond by email.