I got some low-volume UV printing done at our local City Learning Centre. It is part of a secondary school funded by PFI, and as part of the initiative, they also provide services to the local community and businesses. You probably have one in your area. Ours are not able to do long production runs as their focus is educational, rather than commercial, but I got four A3 acetate sheets printed very reasonably. The quality is excellent. You will probably need to and provide artwork (PDF) and supply the picks in something to hold them in place. If it is just one side printing you could spray tack mount them onto a board. As long as the layout lined up with the artwork.
This is the machine they have: