It's highly unlikely they'll shut down for 20 twenty days. Maybe 20 MINUTES, at most.
On so many levels this 'offline - no parts' for 20 days is rediculous.
Well, Humphrey's is a legit dealership, but I will say this.....if I was a commercial Kubota customer, at the start of snow removal season and they told me I would not be able to order any parts for 20 days.....chances are they would be the last Kubota's I ever owned.