everyone advertises having them but they don't usually have them stocked. when i did my motor build last summer...i got lucky and grabbed the only set of k1 long rods and wiseco long rod pistons that any of the numerous retailers and distributers i called. there was another member who had pauter rods up for grabs for a fantastic price (so good i almost decided to switch my rods since my engine is out of the car) but im not sure if they sold. good luck though. what bearings did you go with? clevite or acl?
edit: if you have a used block you probably are going to have to do a .020 overbore (well since you already have pistons the cylinders will be bored to their dimensions). for a headgasket i would go with a cometic...they are pretty much the best for our motors. .030 is the stock thickness but you can get them up to .051 for the same price. thicker head gasket lowers your compression a tad.