There's a copy of the SEGA tileset (but not the Sega versions of the standard tilesets) for NeoLemmix; which can fairly easily be converted to SuperLemmini. There's also remakes of the ten unique levels that are in this graphic set (as well as two other particularly unique ones - Tricky 21 and Mayhem 17, although the latter is based off the Amiga version's layout and simply uses the SMS skillset); you can see them in the "Extra Official Levels" NXP in the "Sega" rank.
One thing to keep in mind is two important differences between SMS and Genesis here:
1. SMS has fairly different physics from most L1 clones. On the other hand, Genesis's physics are almost identical to DOS / Amiga.
2. Aside from the 12 already covered in the Extra Official Levels NXP, SMS doesn't have any unique levels; it just has slightly different versions of the same levels. (However, I do believe these twelve have not been converted to SuperLemmini at any point in time.) By comparison, the Genesis version has a total of 75 levels that either don't appear in other ports or are significantly different from the other ports' versions of the levels.
I don't know how worthwhile the final product will be, seeing as many players tend to prefer NeoLemmix over SuperLemmini, and have already played the levels in question albeit in a slightly different form. Still, it will definitely be a good project to familiarize yourself with the various editing tools, so if you want to do it for that reason, or because you personally will enjoy it, go ahead - certianly, no one is saying "you aren't allowed to do this".
And also - welcome to the forums!