Jephco Knife supply has different kinds, sizes and types and have the lowest prices. Look under technical for installing directions. Their JP bolts are for removing or permanent installation. Only place I know for 1/8 loveless bolts. Good customer service and cheap USPS shipping. Their selection of handle screws is second to none as are their prices. Check out their synthetic handle materials, especially if you're a fan of Corian or WIAC (wood in a can). JP bolts come in brass, stainless and black oxide finish. I have never used them as I mostly use loveless and corby bolts, biggest is 3/16". Am a fan of small pins.
http://www.jephcosupply.com/products.../hardware.html