They require several more processes than a Mauser/Rem 700 etc. Need an extractor cutout, lug for the forearm mounting screw, need to match the profile to your forearm (or make it bigger and open up your forearm), etc.
One option would be to have someone like Randy Redman rebore the existing barrel - still expensive.
Can't help you on reccomendations for a smith - see if Sinman is intersted in trying it, if he is willing to take it on, I am sure he will do a good job.
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