Dusty, apparently they are in every second garage in every street in the US? I've got a friend in Oregon who buys bikes and parts them out on Ebay, who's never paid more than 100 bucks for a 750/4, even the K0 that he gave me the tach from?
He sent me a pic of two 1975 F's that he bought at a yard sale for 50 bucks for the pair, and I bought the speedo and tach off one and front fender off the other for 50, and he made enough from the rest to buy a couple more.
Don't get me wrong, these bikes aren't "mint" (most times the engines are locked up due to the chilly climate) so he's not destroying bikes that deserve to be ridden rather than parted out, but he's a semi-invalid getting very little help from the US government, so it's a good way to pay his enormous land taxes and put food on the table.
When I emigrate to the US and move into your garage mate, I'll help you locate all these SOHC4 bargains, ha ha! (I'll buy my own beer and Cheese Whiz?) Cheers, Terry.