Hi - try BCFT at Bournemouth (
www.bournemouthcommercialflighttraining.co.uk), they have a HS 125-400 sim which they use for Jet Orientation Courses. For the JOC, the price is £100/hr (but bear in mind it's a bulk hours buy, i.e., you may end up paying more).
Otherwise, BAE Systems in Jerez has a HS 125/800 FNPT II.
Cheers