If you are looking for a small type like C500 series, you should start with the websites of the providers like flightsafety or Simuflite, look into their international headquarters ( Paris, Farnborough, Dubai, etc.) If looking into a commuter type then same thing. However you should be better off trying to find a job first THEN pay for the rating, the rating is not a key or sesame of any kind it is just a leverage to you CPL/IR/MCC.
On your Jar Licence, you will have to do the base check in the aircraft as well; on top of it IF you find a job after that , you are most likely to go AGAIN in the sim for the OPC, because you were not train to operator standards, EXCEPT if you fly for a private operator, BUT in a C500 you are most likely not going to be paid at ALL!!
I'm not going into the debate shall I or Not; but ANY sensible operator either would pay for your type and bond you; or ask you to pay for it, but you would have a job then ! Remember a lot of the C500 series left the "owner flown single pilot ish market" in favor of the C525, most of them single pilot EXCEPT in commercial ops; but then you are stuck for another OPC/LPC/Line training......
Not an Easy choice; the bottom line is that that you need hours, so go for a year or two instructing, get a FI THEN do your rating ( you might be lucky and meet someone who will help you along the line
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