Not at all. i bought them from TK Foto at Funan (level 2). I think only they have it at the moment but I may be wrong.
One thing to take note of though, you should inspect the little round micro anchors at the store (4 for the lease and 2 for the cuff), to see if they click securely onto the lease and cuff. The first set I bought did not give the solid "click" when they are inserted, and that could cause problems if they become unfastened. I got the replacements the following day with no further issues.
I've been using PD leash since they launched in Kickstarter, i was the first few backers in 2012. Got the whole setup of leash,cuff,anchors, capture & plates. All less than S$60 incl shipping (initial backers get huge discounts).
This system is not for everyone as it can sometimes can get confusing, but if you know what you want and need, no product on the market comes close to the level of customization & portability. I just love it, if I don't need the strap, i just push the anchors and off it comes and the straps are so thin, you can put it anywhere for storage.