To answer your question from the other thread;
I would hold off for a year. Even if he is throwing 82, that isn't enough to make any schools interested yet. Which is the whole point of going to a showcase, to present yourself in front of schools. Nothing wrong with going but I'd be saving the money until he has something to show (85mph, 90+ exit velo, or good bat and a sub 7.0) or its kind of pointless.
The showcases in his freshman and sophomore years aren't the end all be all for recruitment. They help the guys who are ready now, but realistically they're money makers for most until they have an attribute worth showcasing.
To answer the question from this thread;
Go to a PBR showcase and play for a notable travel organization with ties to PBR. Or go to multiple and try to keep getting your rank up. That is not something I would do, but if you're looking to get an invite to this specific event, that would be the way to do it.