I have an Amtech 3-1 staple gun. I ran out of the staples and the shop I bought the gun from actually doesn't sell replacement staples. I bought a 6mm pack in another shop and they seem to be coming out of the gun all bent or at two or three at a time can you let me know if they will work or are they too small. Can you recommend a proper size if I can't find any 8mm staples. Thanks.