Hi Mikey and welcome to the site. Unfortunately the answer to your question is no - as far as I know. This is a somewhat undersupplied area of the hobby, although I am sure it will become more popular and hence better supplied in the future.
If you have had a look around, you will have seen the DLG 50 and Quick Flick at Watts Up, they are both great entry level planes, but require some building and don't have ailerons. I built the DLG 50 some years ago and it got me hooked on DLG. I was fortunate subsequently in picking up a second hand competition grade DLG from one of the guys on this site. They are very scarse as only a few guys in NZ make them.
436 Models has a hand launch section which is good for spare parts and Canterbury Sailplanes has the Eagle which is kinda along the lines you are looking at,but is not built up. It does have ailerons/flaps, my only criticism of it is the method of manufacturing means it's a bit overweight at 14 oz. A 1.5m DLG should ideally be around the 9.5/10 oz weight, but very few of the ARF's can acheive this as you really need a bagged wing and tail feathers to do it.
So what to do? There are two choices really, import one from one of the HongKong or Singapore online shops - there are heaps around like: http://www.r2hobbies.com/search.php?pg= ... ype=&scat=
Or, try and score a locally produced hand made one. Most of the regulars will see this post and will chime in if they know of someone with one for sale. There are quite a few owned by flyers in Auckland and Christchurch. Also I think there are a couple of guys on this site who could make one for you, but that might be out of your price range. I will PM details of one to you so you can follow up with him and maybe get a quote.
Where do you live anyway? A pic of my DLG Raven below - this is what a comp ship looks like. Some of the top of the range comp ships can cost up to NZ$3,000.
Good luck and keep an eye on TradeMe - some DLG's do pop up there from time to time.