RockAuto does have a listing for what you are seeking, but instead of 'strut', it'* listed separately under Strut/Coil Spring/Mount assembly. It also does address the wheel size concern as well. It may be a good source to use to get some part numbers from.
A warning however, do thorough research on the pre-assembled units before purchasing, namely finding experiences of those who have already purchased them, to ensure that the springs are correct. There was an instance of a Monroe part number listing to service the 00-05 Bonneville, however it was the same part number for all Bonnevilles (FE1-FE5), and wasn't even the correct spring for the application, which led to the part no longer being listed as compatible for the application, leaving a bunch of jacked up Bonnevilles (the springs rode too tall and too hard) in the process.
Be careful out there, and I hope that everything goes your way on this round.