A few folks have let me know the toroidal transformer used in the "PowerSupply" for Bugle kit is out of stock at DigiKey. They have a batch on backorder, but the wait is long.
In the meantime, you can use PN TE70033-ND, which is the same transformer, but in a higher wattage. Same footprint but taller. Costs about a dollar more. Plenty in stock.