Define cheap?
OTOH, a 'cheap' rating could cost you dearly, like someone is hiring but wants a guy with, say, a FSI training...which certainly ainīt cheap.
The XLS is an airplane that isnīt cheap to operate, so the usual 'cheap' route on the actual arplane is not the answer IMO. That leaves the known sim training facilities: FSI, CAE....is there anyone else with a XLS sim ?