I will assume you are talking about fasteners - bolts, screws, nuts, washers... Most of the fasteners on these bikes are of very few sizes. All of course are metric. Most will be 6mm, many 8mm and a few larger ones and smaller ones. Most can be had at your local hardware or home center. The specific fasteners - head style, etc. may not be available if you are trying to do a faithful restoration. For those you will have to go to a specialty supplier. If there is a Fastenal store nearby they will have or can get whatever you need. There are many suppliers available online, the drawback is you MUST know what size and configuration you need to order sight unseen! Since you do have three bikes, you should be able to find the needed fastener on one of them if only to use as an example for ordering.Oh i got parts! I think the only thing i am missing is handlebars. 2 of 3 are titled. It is just the hardware sizes so guess the book comes out.