I've got two bikes with mid 80's Tange Sekine headsets:

1986 Miyata 210 (33mm Locknut). This was a $150 CAD bike but I've sunk several hundred more into it since purchase (wife's vintage ride).
1985 Norco Avanti (34mm Locknut + small diameter three notch threaded spacer). TH-235. This is a $60 bike.

My Park tools won't cover me for this work unfortunately. And my stack heights are small-ish.

So I seek recommendations. Ideas that I've come up with based on my research to date:

1) Swap the existing headsets -- or at least the tops of them -- for the new Tange base model which uses 32 mm locknuts.

2) Buy a Hozan small diameter hook spanner tool and wrenches for 33 mm / 34 mm. Finding reputable wrenches at a reasonable prices is proving very difficult. I also don't love having to retain tools that are only useful on two of my family's twelve bikes.

3) Buy a Hozan small diameter hook spanner and an adjustable Hex wrench. Like everyone, always, I've not enjoyed using crescent wrenches on my hex nuts. Is there any reason to expect the adjustable hex wrench thing to be better?

Recommendations?