Recommendations for non-OEM brand of Brake Power Booster

I have a 99 4Runner with 260K miles on it. My brake power booster is going out - already confirmed it's not a check valve, hose or vacuum leak. Don't want to spend the money on an oem replacement - can anyone recommend another brand you've used that's not as costly?? New one's on Amazon start as low as $50 with OEM replacement over $800. Thanks!!

 

Junk yard might work too if you go in your area.

 

I bought my daughter one off Amazon for around $65. She drives a lot and it's been fine for about 1 year.

 

Thanks Clutchplate. Any chance you could look up the vendor/manufacturer for the part on Amazon? Thanks!!

 

Can you rebuild these things?