I'd suggest checking around for someone in your area who is proficient in HPDE welding. Bob's suggestion of contacting the mfgr is always a wise move.
Mfgr: KL Industries:
"WARRANTY
Please call us at 231-733-2725 if you have questions or a
problem with your boat. Do not return the boat to the
retailer.
KL Industries, Inc. warrants to the original owner of any
KL Industries boat. Any part of the boat that is defective in
material or workmanship will be repaired, without charge,
at the purchasers’ local dealer or at KL Industries.
For personal use, this warranty shall apply for a period of
two years on the deck and hull and two years on parts from
the date of retail sale. Any warranties from suppliers of
component parts supersede KL Industries’ warranty. This
warranty covers use under normal conditions and does not
cover damage caused by accidents, alteration, or misuse.
Freight to and from a local dealer or manufacturing plant is
at the owners’ expense.
Warranty is not valid unless registration form is returned
within 30 days of retail purchase."