Not necessarily Danish m84 but there is quite often German flecktarn 'gortex' on eBay (search Flecktarn gortex). A couple of months ago I was lucky/cheeky enough to put a ridiculously low bid on a full set (jacket and bib and brace) and no one else bid so I got it for less than £10 including pp, not saying you can generally get it at anything like that price but it is comparable price wise to British army gortex prices and though I was not expecting it to be anything special especially at the price I paid I have been well impressed with it, my only 'complaint' would be the hood is a snug fit (drawcord around the face) and doesn't work well with a brimmed hat worn under it, though without the hat the hood does a good job. The bib and brace is very good with full zipped (gusseted) legs which makes getting them on and off over boots really easy.
John