Are the UK and US versions basically equivalent? Looks like my daughters have been updated over Christmas (UK 3S) to 42.31128 (note the last digit is an "8" and not a "1" as in the above examples...)
If you also want a copy, I'll see about extracting tomorrow or at the weekend (too late to start messing around now). However, if the UK and US firmwares are essentially the same, I think I can live with a minor version difference of 7...
Or... you could tell me which two lines need modifying and I'll unpack it myself, modify, repack and test. I'll pass you the patched version once it's working if you want. PM if you want and I'll see what I can do over the weekend when the girls are asleep.
If you also want a copy, I'll see about extracting tomorrow or at the weekend (too late to start messing around now). However, if the UK and US firmwares are essentially the same, I think I can live with a minor version difference of 7...

Or... you could tell me which two lines need modifying and I'll unpack it myself, modify, repack and test. I'll pass you the patched version once it's working if you want. PM if you want and I'll see what I can do over the weekend when the girls are asleep.