Here's the "official Maxxis M8008 ST tire site:
https://www.maxxis.com/us/tire/m8008-st-radial/
I'm guessing whoever gave you that "model number" either stated it wrong or you heard it wrong ?????
Maxxis ST M8088 tires are no longer listed in the Discount Tire website search engine (at least I couldn't find them) so maybe DT is no longer carrying the brand/tire ?????
Have you looked at Carlisle Radial Trail HD tires? Check pricing at WalMart.com. DT will usually honor the WalMart price saving you a few bucks.