Where?
I did used to get my Ebbro models from Orange Dragon too.
Their Ebbro main UK importer.
As all of the Ebbro models are Ltd editions (4000) they soon go out of stock.
I found them Orange dragon limited and unable to try to get hold of the
rarer models.
Now I go too EWA Model cars in the US (
www.ewacars.com)
They were able to get hold of most of them. They even found the last
R32 Axia race car in HK, shipped it to me in two week!
Take a look at the Ebbro museum for the older stuff, some still avalible @ EWA.
There are R32 1/18th avalible too. These are Calasonic and Zexel race cars.
Not sure where to get them, but going to
www.Ebay.com and searching for:
'Nissan Skyline' always brings up plenty of models.