Actually the posting says it will fit 92-98 2 and 4 door cars. It doesn't say it will fit the e30.
But now you've got us wondering. Can it be that big a deal to fit it? For the most part it just bolts to the tunnel. The parking brake seems similarly placed. Maybe if its longer you'd have to cut the front edge to match it up. The trouble with an arm rest version is that its going to have to be more securely mounted than a non arm rest console. I'd actually be more interested in the 95-98 console with the cup holders.
I wouldn't test it with a $100 one off ebay, but if your local pick n pull has an e36 in stock its probably less than $10 for the part.
Let us know if you attempt it.