I am trying to find out if there are affordable places where you can get shower to tub conversions.

I have done conversions from a tub to a shower but not the other way around. What is your current setup and dimensions? Affordable, how much is affordable in your book?

Answer Bobs questions. Are you on a slab or is the shower located on a wooden floor? The wall will have to be opened to reconfigure the mixing valve and raiser. Also the floor will have to be opened up to install a tub dap out,(see image) . The limiting factor, as I see it, is space. You're going to need 60" to install a regular tub. Have you got it? Back to you, Tom