CA-4?

So back in March I renewed my Nica visa and got 100 days more. The other night I realized these 100 days would not get me to July 23 which is when I leave the country. So I need to leave the country before I leave for good. SO I had it all planned out (okay not ALL planned out, but I had a good idea) of taking a bus up to San Pedro Sula, Honduras. From there I would go west to the Maya ruins of Copán. From Copán I would continue west into Guatemala where I would catch another bus back to Managua (hitting El Salvador on the way). BUT THEN I find the hitch to my plan. El Salvador, Nicaragua, Guatemala and Honduras are a part of the CA-4 Border Agreement (or something like that). Meaning that you can travel freely among the 4 countries (yippee!) but dropping into the country will not renew your visa. Crap! So it looks like I either go ALL THE WAY UP to Belize or Mexico, or spend some time in Costa Rica (where I have already been). So... what would you do?