I've not noticed them in the wholesalers warehouse. They have a limited range of fresh meat, most of the stuff's frozen or vac-packed ready prepared in portions for pubs etc. Oh, I tell a lie - they have it at their online shop - http://store.makro.co.uk/c-1902-pork.aspx - but as you can see, the belly (in bone) is £2.49/kg (£1.32/lb) the ribs at £4.50/kg (£2.05/lb) are cut into pieces, and the others are £4.99/kg (£2.27/lb)!
Obviously, many places do sell them. If I go to the abattoir where I shop I could get them easily but it's 18 miles away so I only like to go when I need a big order - I know that may sound daft to you but our petrol (gasoline) here is over £6/gall (nearly $10/gallon!).
I guess that I shouldn't be so 'tight fisted' and go to my local butcher.
Phil
P.S. Thanks for the tip about the membrane.