The problem you have is that the Classic 2 was designed as an integrated package and changing arms is going to be difficult.
On most TT’s you would have a removable arm board, and when choosing an arm you would find the spindle to pivot distance and check to see if the arm will fit on your turntable. In you case you have a mounting distance to the VTA tower - slightly different to pivot to spindle.
If the tonearm doesn’t fit then you may end up drilling new holes in the plinth and devaluing the TT for future sales.
It seems to me the most logical choice you have is the VPI FB10 Gimbal arm which uses the same base as your current arm.
The problem is that @ $4.5k for the VPI FB10 there are far better arms available for that spend -
2 examples are
Kuzma 4Point9 ( 9" arm ) - probably won’t fit without drilling the plinth.
Reed 2G/4P - The Reed arms have a 10.5" option with pivot to spindle and VTA tower very similar to the VPI. Might possibly fit.
In my view you really have only 3 practical options -
Instal the dual pivot upgrade
Purchase the VPI FB10 Gimbal arm ( sell the unipvot ).
Buy another TT which gives you a wider arm choice.