Only had eVent in walking shoes, so not going to comment about it really other than it worked really well in those.
Gore-tex, I've got a Chapak gore-tex cape that I got in
Decathlon in France a few years ago (about E100, so a nice bargain when the £ was around E1.45). It is a no frills type thing, packs small enough to fit in a jersey, keeps the rain off but the outer fabric just wets out too much,and if the outer fabric doesn't shed the rain, it looses breathability very quickly. But I'll stress that this jacket is about 8 years old, it looks like maybe an old fashioned 3 layer version of GT was used, so the newer versions will have advanced greatly in the meantime.
For the OP I found the
Altura Nevis at
www.bikesyoulike.co.uk , the 2008/9 version for £34.99, free delivery,ordered on Friday night, website clearly states no packages dispatched on weekends, arrived on wednesday so reasonably quick delivery allowing for the fact it would have only gone out on Monday at the earliest.