Taxidermy fees?

[Mr. 16 gauge]

Anybody out there give me some ideas as to (roughly) how much it will cost to get heads mounted? I'd like to get everything I take mounted, but I'm starting to think that impractical. Wanted to get some idea of the costs, but none of the African taxidermy websites will post prices! Kinda hard to plan when you don't know.
Trying to plan this in advance as much as possible, with as little surprise as possible.
Also, I'm thinking it might be cheaper to have the work done in Africa and shipped over to the States, rather than have the specimens dipped, salted, and shipped here to be done.....any thoughts?

Just for the sake of argument, lets say two large heads (such as a gemsbok & Kudu) and 2 average heads (such as Impala, Wildebeast, hartebeest, or Blesbok)
Thanks in advance.................