Not a guide, but this would be the official repo for the wegld contract: https://github.com/ElrondNetwork/sc-bridge-elrond/tree/main/egld-esdt-swap Any reason why you want to create your own wegld version?

is there a deployed one on dev?

"wrappingInfo": [ { "address": "erd1qqqqqqqqqqqqqpgqd77fnev2sthnczp2lnfx0y5jdycynjfhzzgq6p3rax", "shard": 0 }, { "address": "erd1qqqqqqqqqqqqqpgq7ykazrzd905zvnlr88dpfw06677lxe9w0n4suz00uh", "shard": 1 }, { "address": "erd1qqqqqqqqqqqqqpgqfj3z3k4vlq7dc2928rxez0uhhlq46s6p4mtqerlxhc", "shard": 2 } ]