I’m not sure if this counts as a resource, but I’ve opened tuning commissions! Vocal Synth Tuning Commissions !!! Feel free to post your own commission info below 
Starting at a base price of $10 USD I will tune a song that is up to 4 minutes long in English, Japanese, or Chinese. (Maybe Spanish if you’re okay with the tuning being in OpenUTAU).
Engines I have are: VOCALOID 6, VOCALOID 2 (Only Sweet Ann), Synthesizer V Basic, OpenUTAU, and NIAONiao.
*** PLEASE NOTE: If you ask me to tune in NIAONiao, there is currently no way that I know of to convert that tuning to other engines. Once it’s a .nn file, it is stuck that way. Same in reverse, tuning does not transfer into NIAONiao. Please keep this in mind before you order. I will tune Originals and Covers (as long as it does not go against the TOS of the files you send me).
Please provide files (VPR/SVP/UST/ etc.)
For songs over 4 minutes, please add an additional $1 per minute!
For an additional cost I will do manual cross lingual synthesis using phoneme editing. I am best at Chinese to English, but will also do Japanese to English.
Phoneme editing is a major part of my tuning process for English music. If you do not want me to touch the phonetics, please let me know when you order.
Voicebanks available: -V5 and V6 Default Voicebanks (Amy, Chris, Ken, Kaori, Haruka, Allen, Sarah, and Akito) - MEIKA Hime -Gumi V6 -Gachapoid -Avanna -IA V3 -Merli -Sweet Ann -Kotonoha Akane & Aoi (SynthV) - Many Many VCCV English UTAU - Even more NIAONiao - Any SynthV Lite banks that are still available for download
Feel free to message me with any questions before ordering