Reflash is not possible on 07-08 but flash pro is available. It's more expensive but it can be tuned to better take advantage of the specific upgrades you do.
Either your post is not technically accurate or you don't understand what "Reflash" and flashing your ECU really means...
You can absolutely get the Hondata "Reflash" from any Hondata in the US for a 2007-08 TSX ECU from a local Hondata dealer.
Flashpro Dealer reflash
The Hondata website is confusing as it should say 2007-08 TSX
ECU rather than just 2007-08 TSX, since the 2007-08 TSX ECU swaps so easily into the 2004-06 TSX.
The question then becomes is it worth just getting the standard Hondata Reflash which you are then stuck with, not able to customize, remove or do anything with it without a Hondata dealer or should you buy the full Hondata FlashPro which comes with the Hondata "Reflash" which you can load yourself.
IMO, if you already have a 2007-08 TSX ECU in your TSX, the logical choice is to buy the full FlashPro programmer for $695 rather just getting it reflashed for $350.
I also recommend that everyone read the Hondata website top to bottom before purchasing anything.