What do you think it is that they never replied?

Arrow pipes are available on arrow website, but there are just pics, no details on weight/weight savings or power difference or whether it would fit various panniers and racks. A german company claims to sell them at over EUR900 for the titanium one and almost EUR 700 for the alu plus the 2-in-1 connector pipe for about EUR200, yet they still don't have them available even they said on the website that it would be in October.