4 custom mods required for version 1.43

Looking for a few custom mods for version 1.43, I do have a few things on my wishlist, some of which have been suggested earlier in this thread:

1. Recommended Retail Price - we always sell under RRP so we want to show that saving, at the moment I'm doing it as a discount but would be nice to have a separate field so it doesn't get confusing when there are additional discounts on top.

2. Cost Price - so what the product costs us to buy in, it'd be great if there could then also be a report of cost/retail profits in Admin.

3. Wishlist - to allow users to add products to their wishlist, and potentially to share this wishlist with others.

4. A mod to allow the cart to create a second invoice with no prices as this could be used as a purchase order also this would need to be editable. This would have a separate tab in the admin side.

Many Thanks

Can anyone help please.