The part number is prefixed with AA206-011-154-105 & 107 You will find them a good bit cheaper than the OEM part, they carry FAA approval, as do all PMA parts out of the USA.
As far as the 1200 Hr / 24 Month life limit goes, the OEM straps are manufactured by Lord corporation who manufacture straps for other aircraft in the same manner to the same standards, yet in other airframes they have a ten year life limit or are on-condition.
The straps used to suffer corrosion to the wires after the casing split or cracked. The material used to encase the wires these days is very different and I havent seen one cracked or split in more that 15 years,
Its quite possible that the 24 month life limit is one of the 206 parts that BHT are reviewing under their life extention programe. Lets hope
