
There is one option in 20m Orange Lc To Lc OM2 Fibre Optic Patch Cables, priced at £16.54 inc VAT. All of these are 20m in length.
OM2 is 50/125 multimode fibre that carries Gigabit Ethernet up to about 550m and 10 Gigabit over shorter links. It is common in older building backbones. Match OM2 leads to OM2 cabling.