Sure bhante. But I am not sure about how it works in the case in which someone comes to SuttaCentral after a sutta and all he/she has the PTS reference number.
Using the search function as it is returns nothing useful when I look for “AN ii 103” for example:
It seems to be to me a very low hanging fruit and I cannot imagine the effort of mirroring the tables found in the link I provided would be that great from a website development perspective. Beside that, there would be no maitenance retirement as the linkage between different reference number is static.
If I may, I strongly recommend we give it some thought. And of course, I volunteer to do any heavy lifting required and which is within by abilities!