I am looking for pricing on the following injectors:OE: 0445120008,HEUI Injectors (AP63800AA, AP63801AB, AP63803AD, AP63813, AP 63804AE) andCummins Injectors(0445120114, 455120050, 0432193581) for U.S. Sales. We would like to buy a few samples to test the quality of the units before we would purchase for resale. I am also interested in know what you minimum orders are. Do you take payment through Paypal?How long to fill an order and ship?Thank you