Plus it's not projump who make them, it's a factory in china who control the colours and quality.
FlyingLocust do not make calf cuffs (yet), so ProJump would have to sell the only ones available(poweriSers), and I can't see them doing that. Plus it would infringe on patent laws and they would get in serious trouble.
If you want calf cuffs, get someone in mainland europe to order them for you, and then ship them on to you!