These are the basic parts of the system. 3mm for small anchor terminations. 5mm for multiple terminations/anchor points. With skill you will not need larger anchoring islands, but if you do, simply glue 2 alongside each other and bridge across.
Pack of 20 x 3mm & 10 x 5mm    HP-9564
Pack of 40 x 3mm & 20 x 5mm    HP-9565