Heater Core for a '91 2.8l V6 Trooper?
 

I can't find this part anywhere, was wondering if someone could help me out, or if a different core can be substituted?

Is this one on Ebay a match? New HVAC Heater Core Front Chevrolet 1988 1991 K1500 K2500 K3500 w O AC 52452918 | eBay

It looks a lot like the right one in rockauto's pic: More Information for SPECTRA PREMIUM / COOLING DEPOT 99365

Thanks!