I've seen the cam locking tool for about £4 to £8...but the crank locking tool is from around £25 upwards....2 types on the market..not seen the crank tool in halfords😄 buy a cam locking tool and make a crank locking tool...after removing starter you only need to fabricate some steel flat that bolts in starter housing and weld a tooth to it that mates to the ring gear...when you see a crank locking tool in the flesh you will say I could make that!!!