Want to buy kayak and Freedive buoy

Halo,

1. I've not had any luck finding a  kayak for myself and my dog - he is about 9 kgs.  Can be second hand or new.
2. Also need freedive buoy, dive flag and line for freedive -to alert boats. Tried diveshops here, tried online overseas - nightmare it seems with posting issue.

           Can be second hand. 

Thanks  Snorkler Sue.