The following companies may be of interest to you . . .
1. Connor-Winfield CrystalOscillators Full Line USA manufacuturer of quartz crystals (including HF Inverted Mesa, precison at-cut and SC-cut), clock oscillators, VCXO, TCXO, OCXO, PLL freq translators and Sonet synch modules. www.conwin.com
2. CrystalOscillator - Transko Manufacturer of crystals, filters, oscillators, LVDs, LVPECLs, VCXOs, TCXOs, OCXOs, and VCOs. Among others are low noise & jitter oscillators, thru-hole, SMD lead-free. Quick turn delivery. www.transko.com
3. Custom Crystal Filters / Oscillators Highly selective group delay and amplitude equalized. Amplitude and phase matched filter pairs. Linear phase. Up to 500 MHz. TCXO/DCXO/OCXO/TC-VCXO/Wide band VCXO. Frequency up to 1 GHz. www.kselectronics.com