Inquiry about LED T8 Retrofit Lamps

I am sourcing LED T8 retrofit lamps for interior lighting in railway vehicles. Key requirements include: - Basic specifications: 1:1 retrofit, G5 and G13 base, direct operation on 36V DC, voltage resistance per EN 50155 (including S2/C1), reverse polarity protection, and integrated electronics. - Length variants: 438mm (G5 and G13), 549mm (G5), 849mm (G5), 1149mm (G5), and 1449mm (G5). - Lighting performance (reference for 1149mm): ≥2200 lm, ≤25W, beam angle ≥240°, with options for 3000K and 4000K. - Environmental and reliability: Operating temperature range -20°C to +50°C, L90 ≥40,000 hours, ≥100,000 switching cycles, and maintenance-free. - Standards compliance: EN 50155, EN 45545-2, CE/RoHS, with certification evidence required. I need details on product availability, datasheets, indicative pricing, lead time, and possibility of samples for type testing. Long-term spare part availability for at least 20 years is essential.