The larger bowling alleys around here send their used pins in to be refurbished and then sell them to smaller bowling alleys.
If you can find a smaller bowling alley they may give you pins.
I still have about 400 pins in my barn and I also have a regulation Second Chance style tiered pin table.
On my website is some actuall size pin targets for those that want to print some paper pins to practice on.
Best Regards
Bob Hunter
www.huntercustoms.com