Cisco 3524XL Switch IOS

I found an IOS image that can be downloaded via anonymous ftp from ftp.cisco.com for the discontinued 3524 XL cisco switches that enables 8021q:

/pub/lan/catalyst/c3500xl-c3h2s-mz.120-5.WC10.bin

Hardware specs:

cisco WS-C3524-XL (PowerPC403) processor (revision 0x01) with 8192K/1024K bytes of memory.
Model number: WS-C3524-XL-EN

8021q VLAN support enables you to setup a linux or openbsd appliance with multiple vlan interfaces on a single network interface.

3524XL switches are cheap on ebay; a small office or test lab would work well with this switch. I have 4 to 5 vlans on my switch at any give time, 3 of which are production, and then some test vlans.