I really think that a ratcheting (flex would be nice as well) box end on a combination wrench is the best way to go. Are spline wrenches recommended?
SK Reversible G-Pro Combination Wrench Set
SK Universal Spline G-Pro Ratcheting Combination Wrench Set
Are these made in USA? A reviewer on Amazon said the 89700 kit was made in Taiwan. That appears to be true according to the SK website as well (doesn't say made in USA as some items do).
Where are Armstrong mfg? They are owned by Danaher so I assume USA, same as Craftsman. 52-807 is their 7mm (6-19mm) but I can't find a p/n for the set that this wrench is in. It is only listed as Metric Combination Ratcheting Wrench under Ratcheting Wrench, Reversible & Combination with 13 other wrenches. Their website is horrible. I'll see if a local distributor can make sense of it tomorrow.
Craftsman doesn't have a 7mm reversible ratcheting combination wrench. I guess I could buy a Craftsman set & get the 7mm as the 12-point combo wrench w/o ratcheting or flex. Of course, that applies to many mfg.
Proto SCVM-13S is another possibility. They are $217 after my 10% discount. They include 7-19mm & are 12-point. Where are they mfg? They are owned by Stanley.
Snap-On Flank Drive Plus are real expensive & real nice but only go down to 10mm.
Mac has a pretty poor website as well. They don't list the sizes that are in their wrench sets. Moving along...
Matco SRFBZXLM102T is only 10-19mm. This is their spline wrench set.
Matco SGW85698 is 8-19mm. Are all Matco wrenches made in USA?
JH Williams only has 8-19mm for the flex ratchet combo wrench. They have 6, 8-19, 22, & 25mm in the standard ratchet combo wrench. Close but no cigar as I need 7mm included.
Wright Tool doesn't appear to have any ratcheting combo wrenches only double box end.
Cornwell ratcheting combo wrenches are 8-24mm. Where are they mfg?