Hi Northern107, welcome to the club, if you can remove and fit the front bumper you can fit the angel eye headlamps no problem. I organised the group buy at £200 per set +£10 p&p. I also made the 'How to fit' guide too, which as you found out is in the full members only section.
As for the interior parts you require, there was an ex member who seems to buy things from his local breakers, but he's way down in Devon. I have the same problem up here with local breakers. I guess 107 owners are more careful drivers in our areas and why they're like Hens teeth in our scrappers.

The door handles you speak of, do you mean the grab handle you pull on to close the door? If so they just pop off with a thin blade screwdriver on the edge. I also painted the window switch bezel, just to finish it off. As for the heater controls, quickest and easiest way is to remove the radio/facia panel (as it's off may as well paint it too

) then that gives you access to the control wires for the big knobs and remove them.
As for putting it back to standard, I'm not fussed about that, I'd trade it in/sell it as is, saves you buying other bits. My dealer wanted to see mine after I painted it, as when I collected it the dash was stripped down. He said it was the first time they'd let a customer pick up half a car.

When he saw the end result he was pleasantly surprised how good it looked and said Peugeot should offer an interior colour coded pack as an option. He had no objection to me trading it in when time, as he thought (a) most customers wouldn't know how it should look unless they've been looking around a few 107's (b) some customers would like the painted parts as it looked better than standard.
Anyway here's how mine looks...

By the way, as you're not a full member, you will not have a clue that we are having our National Meet this weekend (9th-11th July) in Staffordshire. You should come along and meet some of the members and see our cars. Camping Friday and Saturday nights.
Venue: Dunston Heath Farm, Dunston Heath, Stafford, Staffordshire, ST18 9AQ