I got married at Catcha Falling Star in Negril and just asked them to use whatever baker they typically use. I didn't expect much, since I wasn't able to do a tasting and hadn't read much about Negril bakeries, but I swear it was the best wedding cake I've ever had! We got a pineapple cake with coconut custard filling and vanilla buttercream frosting. I just asked them to decorate it with fresh flowers in my colors, and it looked great. I think we only paid around $300 for it--two tiered, fed about 40 I think (we had 20 guests, but there was a lot left over that we let the staff share). I'd highly recommend tracking this baker down, the cake was amazing.
They said the baker was Opia & Jerry Plummer at Roots Cafe. I've googled them and don't see much online, and they don't have a website. If you're interested, email Andrea at