Thanks for the reply, ya that's how I did it. Post to hook in the shortest geometry distance (when it's kicked up/back) is right at what looks to be 100mm. For whatever reason the ACE (my only stocked hardware store) had been picked over for springs. Best match I could find was a 3.5"x.5" OD spring. ALMOST works, just not enough compression when kicked up. They were out of 3.25"x.5" and 3"x.5" so time to drive further and see if anyone else has em.
Point of thread was to see if anyone knew the Pacer spec one, and I'd just be lazy and order one off mcmaster.