Fidel,
You might want to contact Ernesto Romeo, who is an educator and lives in Argentina.
Consider the following brands:
For your filter, you can look at
https://www.synth-werk.com/content/modules for the 904a filter and the 914 Envelope Follower module. These will probably be superior to the MF-101. Gerhard is very dedicated and his products are some of the finest.
The MF 103 is pretty unique sounding, almost too much, but a combination of things might work, including various stompboxes. But if you are looking for a module only, try this company:
https://freestatefx.com/products/109 . Jason Fry is a very competent builder.
Moog's mf102 Ringmod is excellent, you might just want to go ahead and see about getting one of those. I'm not aware of it's modular equivalent. There are ring modulators out there, Synth-Werk has one, but it's not the same.
For the 105, look again at FSFX
https://freestatefx.com/products/ffb. To get the outputs animated, see about this scanner from Modcan.
https://www.modcan.com/bmodules/scanner.html I'm not sure if Bruce is taking orders because there have been posts that have indicated that he has slowed his business down at one point, but someone on the modwiggler forum might be able to recommend an alternate for a scanner module, as well as for a ringmod.
Here is a video of mine comparing the sound of a few different Moog eqs and FFB options with the Murf.
https://www.youtube.com/watch?v=INCcZTwxfW8
All of these can be housed and powered with synthesizers.com cabinets, but if ordering from Synth-Werk it would be better to just get a power supply and cabinet from him, especially if you would like to order his 907a or 914FFB. Tell him what you will be buying and let him guide your power distribution needs.
Don't forget to reach out to Ernesto. He's going to be able to help you better than most.
Eric
