Welcome to XF2 Addons. You can buy my Premium membership for $35 per year, and this gives you access to download any or ALL of the 300 add-ons that I have developed for Xenforo 2.x. In addition, Premium members will get technical support. Once the Premium membership has expired you can continue to use the installed addons on your forum as long as you like.
Good idea, as it will get confusing having two Bookmark systems running.
Saying that you can switch the XF one off in the ACP I believe- this might be the way to go, retaining the XF2 version.
Does anyone know what each version does as a comparison?