Based on an email exchange w/ a W coast ham reseller, I precision machined a bending fixture (jig) for bending UT-250 1/4 inch copper hardline into the proper shape to join HP attenuators such as the HP8494A & 8495A together.  HP made a kit that does this, it is called an HP11716A (A for N connectors) and has the U-link as well as a bracket. I made several of these U-Links for a customer that never materialized!    

    Now you can benefit, as the hard part is finding UT-250 for reasonable cost, and then bending it precisely, not easy if you are making only one!  The cable I used is standard, USA made UT-250 from Uniform Tubes, teflon dielectric, copper jacket & silver plated inner conductor, high quality stuff.  In order to finish this, you buy N male to 1/4 inch hardline connectors from Cross RF or others, and with this cable U-link, you can assemble one for yourself. You can trim the arm length down tight or leave longer, as is your wish. If the demand is there, I can make the completed cable as another product. The attenuator set and HP U-link shown in the photos is not for sale, shown only for clarity.  You get 1 formed cable for the price!  Have fun!  

Check out my other item for more RF stuff and remember to ask for an invoice on multiple item buy as I combine items for lower shipping. Ask me to invoice you with adjusted shipping before you pay.