Need help with a DAC build (Bloodac 4 x TD1541)

Hey All,
I recently acquired a Bloodac 4 x TDA1541 DAC board and 4 TDA chips. I've been trying to complete the project but I'm very new to DIY and need some assistance. I reached out to FMs that have previously built this board with no reply (maybe my mistake of reaching out through DMs directly).

I have also reached out to the seller of the board Raindrop Hui but haven't been able to get the design files yet.

From the board I can see that some of the regulators are missing heatsinks and a capacitor is missing. I have ordered the missing components already. I'm trying to get it to working condition before doing some tweaking (Lampizator has mentioned a few upgrades for the board).

One question I have with going ahead is related to the toroidal transformer that I should use for the board. The board itself has 2 x 11VAC and 4 x 18VAC inputs so I'm not sure what transformer to pick/buy. I contacted a local transformer maker and they asked me what amperage I want on the secondary section. I'm not new to electronics but I'm very new to DIY audio so I wanted to start a thread here to get some help.

I have attached images of the board and the link to lampizators post is: fourTDA_dac

EDIT: Link to board images Bloodac 4 x TDA1541 - Album on Imgur
 
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