The Maxim part is actually a chipset (MAX250 - 251) but you have to add a transformer and optocouplers yourself. Is that what you mean by "haystack" Erik?

I myself have done it with discrete parts; four opto's, a DC-DC converter and any 'standard' RS-232 transceiver. Since my application communicates at 115k2, I've used fast opto's for Rx and Tx (HCPL-061A).
The circuits have been in use since 1997 and must have transmitted and received countless millions of bits without fail and, more to the point, without damage to my devices...

Best regards,
Rob.