I can't see that you'd need a pair if you've got the centre stand, just something to prop the front up if you take the front wheel off.
I took the centre stand off my Gen1 and, when I need to do anything substantial to it, I use an ABBA Superbike stand. Easier for one person to use than paddock stands and very stable. Highly recommended, and they do a front support to go with it if you want to take the front wheel off.
Details here: http://www.abbastands.co.uk/product_details.asp?id=1
I took the centre stand off my Gen1 and, when I need to do anything substantial to it, I use an ABBA Superbike stand. Easier for one person to use than paddock stands and very stable. Highly recommended, and they do a front support to go with it if you want to take the front wheel off.
Details here: http://www.abbastands.co.uk/product_details.asp?id=1