Ah....
I've always liked Keltec firearms myself... The 3PAT I had was an awesome little gun and fairly accurate for what it is. I've tinkered around with the sub-2000 in .40S&W and liked it but thought it was kinda awkward at first. The 30rnd 22 magnum pistol looks great.... I'm a lefty so I wish more guns were like the RFB. Everytime Keltec comes up with something new they definitely get points for designing out side the box...
You'll probably be wasting your time going to the pawn shop.... Unless you're really bored one day I wouldn't go. It's definitely NOT within walking distance from your hotel and I guarantee it's going to be PACKED with tourists.... You MIGHT get a glimps of Chumlee (big maybe) and all the transaction you see on TV you'll never get close to that...
Here's the part you more than likely need.
http://www.appliancepartspros.com/part_details.aspx?part_id=3866035
I called Columbus Appliance and Parts on W. Broad St across from Westland Mall and they said they could have the part in for you tomorrow (Thursday) and it's $79.90.