I sent an email to Vanguard, which was replied to by Concierge Services, stating that Vanguard will accept a wire transfer for a 401k rollover to a Vanguard IRA. I have not yet done the rollover, but I'm planning to do it soon. I will post an update on how it goes.
Here is the full message from Vanguard:
Thank you for your continued interest in Vanguard.
You can wire assets into an existing Vanguard(R) IRA account by providing
the following information to Schwab:
Wire to:
* FRB ABA 021001088
* HSBC Bank USA
452 5th Avenue
New York, NY 10018-2786
Credit to:
* HSBC account 000112046.
* Vanguard incoming wire account.
In favor of:
* The fund name and number (or "Various funds" if you are investing in more
than one).
* Your account number at Vanguard.
* The name and address listed on your Vanguard account.
You'll receive the current day's trade date in either of these cases:
* You call us by 4 p.m., Eastern time, to let us know about the upcoming
trade and then fund the trade by 6 p.m. that same day.
* We receive the wire in good order by 4 p.m., Eastern time.
Otherwise, your trade date will be the next business day.
Note that money market funds will begin earning dividends on the trade date
only if the request is received (whether by phone or wire) before 10:45
a.m., Eastern time (2 p.m. for Vanguard Prime Money Market Fund).
Otherwise, the wire amount will begin earning dividends on the next
business day.
To avoid any delays with your wire purchase, please contact Vanguard at
888-629-4920 before sending your wire.
If you have any questions, please call Vanguard Concierge Services at
800-414-1742. Specialists are available on business days from 8 a.m. to 8
p.m., Eastern time.
Thanks for all of the replies.