Just Starting Servo Motor Question Alternative to Recommended servo?

[Les Cahan]

I'm just starting my inmoov build and because of inability to order the suggested HK15298B, I've been looking at the HDD servos from EZ robot that were suggested in one conversation here in 2017.  My question is what servo should I get and will the printed parts not be correct because the dimensions of the servo are not the same as the HK15298B?  Thanks for your help.