The database for that county has no tones listed. His uncle is a member of the dept, so it shouldn't be hard at all for him to ask the Chief or whomever what they are. Shouldn't be too hard to find the filters either, there are multiple sellers offering a very good selection on ebay, as well as guys like Gerry from G&G in upstate NY who have thousands of them.
Leasure, those pagers steele_lpd is selling are a GREAT deal at what he's selling them for. They all look in top notch shape, and for the record, the Minitor II is the best voice pager Motorola ever made (way better than the crappy III/IV series, and in many people's opinions, better than the V). Listen, worse case if you have trouble finding the tone filters, your uncle can still listen to the county dispatch channel, just the pager won't alert for his dept until you do get the filters.