The only possible think beside getting local help is contacting ni Medellin or Cali to Kairserkyhl
My hostel in Cali, Colombia: www.casablancahostel.com
(GPS: N 03.28.147' W076.31.773)
My motorcycle tour and rental business: www.motolombia.com
My videos: www.youtube.com/kaiserkyhl
My Facebook: www.facebook.com/kaiserkyhl
Business Facebook: Casa Blanca Hostel
He sell bikes left by riders across America. Other than that is to buy something here in the US (parts, left over...) and ship it to you. However, that will take at least 2 weeks.
Another idea is you, to continue your trip down to Ecuador and ship what ever to Quito or Guayaquil.
Everything could be done from Miami
Let me know