Hi @bbnano ,
Here's a link to a [https://betterdeals4u.com/product/blu-vivo-5r-charging-port-speaker-vibrator/|supplier] of the board.
Here's a link to a [https://betterdeals4u.com/product/blu-vivo-xl-2-internal-battery/|supplier] of the battery. It has the same specifications and model number as the one you quoted for a Vivo 5r, but you may wish to verify with the seller that it's compatible. There are other suppliers of the same battery online that may suit you better. Just search for ''BL-N3150z battery'' for results.