Not off the top of my
head. You could try contacting RAM
marine on the Rio Dulce to get a high
water mark for prices there (their prices will likely be high, local suppliers likely less).
Matt is usually available locally, but any other cloth will likely have to be ordered from
Guatemala City or imported. Same for
core material.
Note that resins available in Guate are often of questionable quality. Just no name bulk stuff. Proper gel coat can be hard to source...what some suppliers there want to sell you is just tinted resin.