Joe if they are standard LR 16" wheels you shouldnt have a problem fitting your 205/16 tyres to them and steelies are better for laning as they are easier to repair if you damage them. iirc you can get steel wheels for about a tenner each from breakers if your really stuck.
yeh ive got them on a set of es alloys but they toe in a bit because they are 235/16 and me tyres are 205 so i think that if i got some 205 wheels it will open tread up that bit more if you know what i mean and i can put road tyres back on alloys
are you talking wheels or tyres? 205 tyres wont open up any more than 235s on standard lr rims, iirc all disco1 steel and alloy wheels are around 6.5" wide and can easily take tyres from 205 - 265 widths. If your tyres are out of alignment the best thing you could do is get them checked and possibly have your tracking done. the wheels themselves really should not make a difference.
If you want a skinnier set of wheels then the only real option would be to look at swb defender steels which i think were about 5.5" wide.