I've seen two styles of inner tie rod tool - and the longer pipe style (where you insert a crows foot at the end) look to be good?
I did mine recently, I have had a cheap tube one that I have had for years and used on several VW's - it's great as you can confidently undo and torque with it...
However the Mk5 inner track rod is bigger than my tool can accommodate - I just measured the stump of one of the rods in my scrap pile, its 38mm across the flats, too big for your spanner.
In desperation ended up using the type below - that I had struggled with in the past, It does have a tendency to skate more than grip, but to my surprise I got it to work, the bigger diameter must help.
There is a good amount of space down there - Look into getting a Stilson type of wrench