^ Yes. Performaxx WhisperTouch HighTension 17L 1.20 Natural Gut. It has the following desciption on the seller's website:
PERFORMAXX High Tension 1.20mm (also available in 1.27mm & 1.32mm)
Gauge:1.20mm Length: 2x20 ft Recommended tension range: 45 - 60 lbs
For very high power players as full sets or hybrids (excellent with poly).
Normal Internet pricing $39.95
Our premium Natural Gut string is designed specifically for players with a "fast swing and high racket head velocity” game requiring high string tensions. A power and control balanced string designed for power players and balances control and power making programming difficult shots easy while providing the feel and great shock absorption required to minimize stress and strain on your body. Balanced for full court play for power players. You will be surprised to find that H-T can be strung at significantly lower tensions for better feel and durability while maintaining outstanding control and exceptional comfort. Great power, control, feel and comfort.
Not sure if its the same thing that PVA uses (probably not) as there's another version described simply as Whispertouch 1.20mm with the (different) description below. I chose the HT in preference over the normal string because I don't really like the idea of having a very soft string for the mains, and natural gut at 1.20mm is very thin for a main string, so I plumped for what might be a stiffer version of that that natural gut string without changing the gauge or the make.
PERFORMAXX WhisperTouch Natural Gut
Gauge:1.20mm Length: 40 ft Recommended tension range: 45 - 55 lbs
Originally targeted toward light hitting players with a "touch and feel" game, it has been adopted by a wide range of players as full sets or hybrids (excellent with poly).
Normal Internet pricing $39.95
This traditional premium firm Natural Gut string is designed specifically for players with a more powerful game requiring the feel and comfort of gut, without excessive power.
When paired with a modern player and racket, WT provides a softer, gut string-bed with good feel, touch, control, comfort and optimized power. Designed for players with a more powerful game, it is also enjoyed by a wide range of players including those with a power/spin game and those who prefer hybrid string sets. Keeping in mind that thinner gauges provide less durability, this is a surprisingly versatile string. Available in 1.20mm in both 20 & 40 foot lengths, coated or uncoated. Natural golden color.