"Is it possible to create a static route, and EIGRP distribute it with an AD of 175?"
Answered, in my prior posting, likely I was composing it concurrently with yours.
"Doing that, alone, might solve issue (this all assuming primary and secondary are redistributed on different devices.""
Let me describe, what I'm thinking.
On primary routing device you have static route with AD of 1, redistributed into EIGRP. However, you're also tracking reachability to vendor device, if no reachability, static route withdrawn, and with it, the redistributed "copy".
On secondary routing device you have static route with AD greater than EIGRP. If primary device's static is being redistributed, its AD will suppress secondary static route, and if secondary static route is suppressed, it will not be redistributed. However, if primary device's static isn't in EIGRP, secondary device will use its static and redistribute it.
So, if things work as described above, you only need to "track" primary and insure secondary's static AD is higher than EIGRP AD for primary (which should be the EIGRP default).
If things don't work as above, then we would need to adjust at least one (shouldn't need to adjust both, just need primary route AD > secondary route AD; either one could be default AD) of the static route AD cost when in EIGRP.
BTW, without taking advantage of ADs, either implicitly or explicitly, if both statics are being redistributed, on different routers, regardless of their static ADs, both routes should have "equal" ADs in EIGRP, although internal EIGRP costs for the two could make them "unequal" to other EIGRP routers.
PS:
My "lab" is just Packet Tracer, and since PT usually doesn't support "advanced" features, I doubt I could try this and so could not provide you an explicit working example.
