Mitre Gauge for table saw (Allerton BD15)

Looking for one or ideally two mitre gauges for use on our table saw in the Allerton Men's Shed (Registered Charity)
Something along the lines of the one shown in the photograph. Even if it's in poor condition or has missing parts, we may be able to refurbish it to make it safe to use.
These will enable our members to safely cross-cut timber on our saws, so that we can make a wider variety of products.

At the Men's Shed make products from wood to engage our members and to sell to raise funds to help with the running costs of the shed.
The charity aims to reduce isolation and improve mental well-being for men.