Need Help with R4 for 3DS

I recently brought a R4 ( ndsill.net ) for my 3DS, only to found out that my 3DS is actually ver4.2.0-9 sadly the R4 does not support this version. Want to ask if there is any other firmware that I can use?
Thanks.

no, that r4 cannot use alternative firmwares. If there is no update available on the website, you will need to buy a different flashcart.

Thanks! Guess I will have to get one more...