I can't read French either, but the page translate in Chrome actually works pretty well. I found a price on them and it was about 35 Euros - which is right at $45 US, but shipping is $25 - this makes this kit one of the most expensive that I have seen clocking in at $70.
It is a pretty slick kit - I really like the way the bottom of it mimics the head crests from the bigger nids, but at $70 I just can'i imagine this company selling many of em.