OK, so my well-used Hartke TP 115 cab is starting to sound a bit tired and "flappy." The cab itself is still solid, and $$ is tight at the moment so.... .....is this thing worth reloading? What would be a decent semi-budget driver to install (sorry I don't have the box dimensions handy at the moment)? Yeah, I know a K140 would do the trick, but I'm broke at the moment. Amp head is an old "Model 2000" with a SWR 210 as the top cab. Overall tone is very good, but the speaker is starting to show it's age and getting weaker. Any (affordable) suggestions?