I have a South Park that has one accepts 1s, 2s and 5s and has the bill holder intact. The vendor I bought the machine from was going to pull it but I said go ahead and leave it and he did. I haven't tested it but can very easily do that. Does your door have the openings on the left for it? My SP is a Stern make so its late model as well. Not sure what these go for exactly so perhaps somebody can chime in. If you want pix let me know.
Mars Series 2000
Model: AE2411 (can be set to accept tickets)