Advance springs

A few years ago I bought some (aftermarket) "Mopar" advance springs from a guy who had a ton of them. I don't remember if it was from here or from the/6 site.
I guess I should have gotten more sets. I have a couple of "1/2 sets" with the weaker spring left in the package, I only used the heavier of the 2. The lighter one appears to be the same as the original lighter spring.
The heavier of the 2 is still much lighter than the OE heavy spring.
Id like to find a few of the heavier spring from the spring kit.
Looking at pix online of available advance springs the ones listed as "Mopar" have the loops all offset to the one side instead of centered, look like none of the springs in any of my distributors. (Of which all are Mopar)
There are some marked "Chevy" or "Ford" that look more like the same style of spring, but pics, lighting, etc can vary and none have a length listed.
Some claim to be for an "msd distributor" or "accel" distributor but look like they could work.
None of these are priced at the 49¢ it looks like they should cost, some are priced at 60 times that for just a pair. Crazy.
Lots for HEI GMs, lots I see listed for various years of Ford from the 50s and up (different sets grouped by year, none seem to fit more than a 7-8 years span and only certain engines of the respective brand, within that span at that) that look like the same style of spring that are in all of the distributors I have (70s-80s /6 and small block)
What fits, mainly looking for a mid- tension spring. I want to get rid of the heavy stock ones.
Id like to find probably 4-6 of them
Also some (most) of the "kits" im seeing, appear to have 2 of the same spring instead of 1 light tension and 1 "medium" spring.